Unitarity corrections in strong interactions

Singh, C. P.

doi:10.1088/0305-4616/6/8/005

Cited by 7 publications

(13 citation statements)

References 11 publications

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“…In Fig. The values of R(q 2) calculated with realistic wave functions including the effect of D state and meson exchange currents is higher than the earlier estimates of R(q 2) [4]. The effect of meson exchange currents is quite appreciable even at low q2 and amounts to about 5-15%.…”

Section: Resultsmentioning

confidence: 61%

“…3 our earlier results using a Hulthen wave function for the deuteron [4] and the results of Bernabeu and Pascual [5], who used a Gaussian parametrization of the deuteron wave function given by Gourdin [23]. A decrease of 5-8% in R(q z) is exPected to affect the determination of M A of the dipole fit (Eq.…”

Section: Resultsmentioning

confidence: 71%

“…However, the total contributions of the tail region to drr/dq 2 is not larger than 15-20~o [4] and, therefore, the MEC contribution to da/dq 2 from the tail region is expected to be small. This approximation, however, is not best suited to study the exchange current effects as they are expected to be large in the tail region away from the quasielastic peak when the nucleon are considerably off the mass shell.…”

Section: Exchange Current Contributionsmentioning

confidence: 96%

“…Moreover, the closure approximation seems to work well for da/dq z and various corrections to it are shown to be small [4,5]. Final states are, however, summed over using closure approximation.…”

Section: / / Q2 \2 Ga(qz)=ga(o)/[l+~)mentioning

confidence: 99%

“…In determining the gA(q 2) from neutrino deuteron scattering the observed cross section is compared with the free neutron cross section multiplied by a factor R(q 2) given by [4,7,11,12] …”

Section: / / Q2 \2 Ga(qz)=ga(o)/[l+~)mentioning

confidence: 99%

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Pion exchange current effects inv ? +d??? +p+p

Singh

Arenhövel

1986

Z. Physik A - Atomic Nuclei

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The differential cross section da/dq 2 for the process vu+d~ #-+p+p is studied using realistic deuteron wave functions and closure over the dinucleon states. The effect of meson exchange currents is estimated using one-pion exchange diagrams in the static limit. Implications of our present results on the determination of FA(q 2) from neutrinodeuteron reaction experiments are discussed. PACS: 25.30 Pt; 13.15 Cj

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 71%

Section: Exchange Current Contributionsmentioning

confidence: 96%

Section: / / Q2 \2 Ga(qz)=ga(o)/[l+~)mentioning

confidence: 99%

“…In determining the gA(q 2) from neutrino deuteron scattering the observed cross section is compared with the free neutron cross section multiplied by a factor R(q 2) given by [4,7,11,12] …”

Section: / / Q2 \2 Ga(qz)=ga(o)/[l+~)mentioning

confidence: 99%

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Pion exchange current effects inv ? +d??? +p+p

Singh

Arenhövel

1986

Z. Physik A - Atomic Nuclei

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NO-Donors (VII [1]): Synthesis and Cyclooxygenase Inhibitory Properties of N-and S-Nitrooxypivaloyl-cysteine Derivatives of Naproxen — A Novel Type of NO-NSAID

Kartasasmita

Laufer

Lehmann

2002

Arch. Pharm. Pharm. Med. Chem.

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Nitric oxide (NO)has been reported to subserve many of the same mucosal protection mechanisms as prostaglandins and is sufficient for acute gastroprotection and ulcer healing. In fact, NO‐donating NSAID hybrid compounds such as the nitrooxybutyl ester of naproxen show reduced ulcerogenic activity while maintaining anti‐inflammatory activity. We introduce two prototypes of novel triple‐hybrid compounds consisting of cysteine which is known to enhance the activity of organic nitrates and to reduce nitrate tolerance, an NSAID (naproxen), and an organic nitrate (nitrooxypivaloic acid). L‐Cysteine ethyl ester first was N‐acylated in a CH2Cl2/H2O twophase system using the acid chlorides of naproxen or nitrooxypivaloic acid, respectively, and sodium acetate, or alternatively using the DCC‐activated nitrooxy acid in absolute CH2Cl2. The N‐acylated intermediates were subsequently S‐acylated using the acid chlorides or alternatively the carbonyldiimidazole (CDI)‐activated acids again. The two naproxen‐cysteine‐nitrate hybrid prodrugs were screened in vitro for their cyclooxygenase inhibitory properties relative to naproxen. In this screening the N‐nitrooxyacylcysteine derivative was found to be inactive in the concentration range of 0.1—10 μmol/L against both COX‐1 and COX‐2, while the S‐nitrooxyacylcysteine derivative had only weak activity against COX‐1.

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A 66‐Nuclear All‐Alkynyl Protected Peanut‐Shaped Silver(I)/Copper(I) Heterometallic Nanocluster: Intermediate in Copper‐Catalyzed Alkyne‐Azide Cycloaddition

Gao,

Zhang,

Zhang

2024

Advanced Science

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Ligand‐protected heterometallic nanoclusters in contrast to homo‐metal counterparts show more broad applications due to the synergistic effect of hetero‐metals but their controllable syntheses remain a challenge. Among heterometallic nanoclusters, monovalent Ag‐Cu compounds are rarely explored due to much difference of Ag(I) and Cu(I) such as atom radius, coordination habits, and redox potential. Encouraged by copper‐catalyzed alkyne‐azide cycloaddition (CuAAC) reaction, comproportionation reaction of Cu(II)X2 and Cu(0) in the presence of (PhC≡CAg)n complex and molybdate generated a core‐shell peanut‐shaped 66‐nuclear Ag(I)‐Cu(I) heterometallic nanocluster, [(Mo4O16)2@Cu12Ag54(PhC≡C)50] (referred to as Ag54Cu12). The structure and composition of Ag‐Cu heterometallic nanocluster are fully characterized. X‐ray single crystal diffraction reveals that Ag54Cu12 has a peanut‐shaped silver(I)/copper(I) heterometallic nanocage protected by fifty phenylacetylene ligands in µ3–modes and encapsulated two mutually twisted tetramolybdates. Heterometallic nanocage contains a 54‐Ag‐atom outer ellipsoid silver cage decorated by 12 copper inside wall. Nanosized Ag54Cu12 is a n‐type narrow‐band‐gap semiconductor with a good photocurrent response. Preliminary experiments demonstrates that Ag54Cu12 itself and activated carbon supported Ag54Cu12/C are effective catalysts for 1,3‐dipole cycloaddition between alkynes and azides at ambient conditions. The work provides not only a new synthetic route toward Ag(I)‐Cu(I) nanoclusters but also an important heterometallic intermediate in CuAAC catalytic reaction.

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Unitarity corrections in strong interactions

Cited by 7 publications

References 11 publications

Pion exchange current effects inv ? +d??? +p+p

Pion exchange current effects inv ? +d??? +p+p

NO-Donors (VII [1]): Synthesis and Cyclooxygenase Inhibitory Properties of N-and S-Nitrooxypivaloyl-cysteine Derivatives of Naproxen — A Novel Type of NO-NSAID

A 66‐Nuclear All‐Alkynyl Protected Peanut‐Shaped Silver(I)/Copper(I) Heterometallic Nanocluster: Intermediate in Copper‐Catalyzed Alkyne‐Azide Cycloaddition

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